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Abstract

The organic-metal halide perovskite is emerging technology in photo voltaic solar cells. For
any solar cell to get the significant efficiency depends on various design parameters such as
material thickness, device architecture, doping concentration etc.. There are many solar cell
simulation software which can be used to carry out simulation and thus optimization based on
those parameters. Here for this research, we have used wxAMPS because it is freely available,
simple, efficient and quite popular in solar cell research society. The software has been used to
simulate for single junction as well as multijunction/tandem solar cell. Keeping external
parameters constant (one-sun, AM1.5G solar radiation, 1000 w/m² irradiation), numerical
simulation and analysis of a perovskite solar cell with a single junction configuration of
ETM/Perovskite/HTM and a tandem (double junction) configuration of
ETM/Perovskite/HTM/Recombination layer/ ETM/Perovskite/HTM were carried out. In the
proposed single junction configuration Zinc oxide (ZnO) was used as Electron Transport
Material (ETM) as), mixed halide perovskite (CH3NH3PbI3-xClx) was used as absorber
material, and Copper thiocyanate (CuSCN) was used as Hole transport material (HTM). Then
simulation of double junction tandem solar cell was performed. Tandem cells are solar cells
made of multiple junctions with tunable absorbing materials, which aim to overcome the
Shockley-Queisser limit of single junction solar cells. Recently, organic-inorganic hybrid
perovskite solar cells have stirred enormous interest as ideal candidates for tandem solar cells,
due to high open circuit voltage, relatively wide optical bandgap, and low temperature solution
processibility. In this research a new architecture of perovskite/perovskite tandem solar cell
was explored. In this architecture two different types of single junction perovskite solar cells
were used for the tandem structure. ZnO/CH₃NH₃PbI₃₋ₓClₓ/CuSCN solar cell was employed as
a top cell and ZnO/MAPbBr₃/MAPbI₃/CuSCN was employed as bottom cell. The simulation
results shows a significant enhancement in conversion efficiency when compared to individual
single junction perovskite solar cells. These simulation results can help researchers to
reasonably choose materials and optimally design high performance perovskite single and
tandem/multijunction solar cells.